I found the below signature on ebay, and it's linked to Tom Clarke, who played for the Cincinnati Reds from 1909-1917, and died in 1945.

Steve

Thanks Steve!

I must say...the "C" in Clarke bothers me terribly. That has to be the most annoying/ugly looking letter I have seen in an older signature. I couldn't figure out if it was a fancy "P" or what...now that I can even see the "C"...I still can't stand the look of it!